org.wikidata.query.rdf.tool.change

Class RecentChangesPoller

java.lang.Object

org.wikidata.query.rdf.tool.change.RecentChangesPoller

All Implemented Interfaces:

Closeable, AutoCloseable, Change.Source<RecentChangesPoller.Batch>

public class RecentChangesPoller
extends Object
implements Change.Source<RecentChangesPoller.Batch>

Polls recent changes. The first batch polls the recent changes api starting at the firstStartTime. Subsequent batches either start on the last continue of the previous poll, or, if there isn't a continue, then they start one second after the last first start time.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	RecentChangesPoller.Batch Batch implementation for this poller.

Constructor Summary

Constructors

Constructor and Description
RecentChangesPoller(WikibaseRepository wikibase, Instant firstStartTime, int batchSize, int tailSeconds, com.codahale.metrics.MetricRegistry metricRegistry)
RecentChangesPoller(WikibaseRepository wikibase, Instant firstStartTime, int batchSize, Map<Long,Boolean> seenIDs, int tailSeconds, com.codahale.metrics.Timer recentChangesTimer, com.codahale.metrics.Counter recentChangesCounter)
RecentChangesPoller(WikibaseRepository wikibase, Instant firstStartTime, int batchSize, com.codahale.metrics.MetricRegistry metricRegistry)

Method Summary

Modifier and Type	Method and Description
void	close()
RecentChangesPoller.Batch	firstBatch() Fetch the first batch.
RecentChangesPoller.Batch	nextBatch(RecentChangesPoller.Batch lastBatch) Fetches the next batch after lastBatch.
void	setBackoff(boolean useBackoff) Whether to use backoff.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

RecentChangesPoller

public RecentChangesPoller(WikibaseRepository wikibase,
                           Instant firstStartTime,
                           int batchSize,
                           Map<Long,Boolean> seenIDs,
                           int tailSeconds,
                           com.codahale.metrics.Timer recentChangesTimer,
                           com.codahale.metrics.Counter recentChangesCounter)

RecentChangesPoller

public RecentChangesPoller(WikibaseRepository wikibase,
                           Instant firstStartTime,
                           int batchSize,
                           com.codahale.metrics.MetricRegistry metricRegistry)

RecentChangesPoller

public RecentChangesPoller(WikibaseRepository wikibase,
                           Instant firstStartTime,
                           int batchSize,
                           int tailSeconds,
                           com.codahale.metrics.MetricRegistry metricRegistry)

Method Detail

setBackoff

public void setBackoff(boolean useBackoff)

Whether to use backoff.

firstBatch

public RecentChangesPoller.Batch firstBatch()
                                     throws RetryableException

Description copied from interface: Change.Source

Fetch the first batch.

Specified by:

firstBatch in interface Change.Source<RecentChangesPoller.Batch>

Throws:

RetryableException - is the fetch fails in a retryable way

nextBatch

public RecentChangesPoller.Batch nextBatch(RecentChangesPoller.Batch lastBatch)
                                    throws RetryableException

Description copied from interface: Change.Source

Fetches the next batch after lastBatch.

Specified by:

nextBatch in interface Change.Source<RecentChangesPoller.Batch>

Throws:

RetryableException - is the fetch fails in a retryable way

close

public void close()

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable